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Home >> Cadillac >> 2021 >> CT4 V, RWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 2.7L (L3B) - Repair Instructions - Ct4 (5 Of 6) >> Piston and Connecting Rod Removal and Installation (AWD) >> Installation Procedure

Installation Procedure

  1. GM2192328Courtesy of GENERAL MOTORS COMPANY

    Ensure the piston ring end gaps are positioned 90 degrees to each other.

    • Upper compression ring joint (1)
    • Lower compression ring joint (2)
    • Upper oil ring rail joint (5)
    • Oil ring rail spacer joint (4)
    • Lower oil ring rail joint (3)
  2. GM5026484Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The connecting rods and caps must be installed in the same order and orientation in which they were removed. If new connecting rods are required, the connecting rod is provided as an assembly, and the upper rod will need to be disassembled from the lower cap.

    Connecting Rod Bearing (2) - Install NEW [4x]

      NOTE:

      The connecting rod bearing anti-rotation tab grooves are to point toward the right-hand side of the engine.

    1. Install the bearing inserts into the connecting rod and the connecting rod cap.
    2. Lubricate the connecting rod bearings with engine oil. Adhesives, Fluids, Lubricants, and Sealers
  3. Install the EN-52525  Connecting Rod Guide Set into the connecting rod (1) bolt holes. This protects the crankshaft journal during piston and connecting rod installation.
  4. Install J-8037  Ring Compressor, piston (1), and the connecting rod to the correct bore.
    1. Lubricate the piston and the piston rings with engine oil.
    2. Do not disturb the piston ring end gap location.
    3. The piston must be installed so that the arrow mark on the top of the piston points to the front of the engine.
    4. Lubricate the engine bore with engine oil, then place the piston in its matching bore.
    5. Tap the piston into its bore with a hammer handle. Guide the connecting rod to the connecting rod journal while tapping the piston into place.
    6. Hold the J-8037  Ring Compressor against the engine block until all the rings have entered the cylinder bore.
    7. Remove the connecting rod guides from the connecting rod bolt holes.
  5. GM5004114Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Ensure that the connecting rod cap is properly oriented on the connecting rod.

    Connecting Rod Bearing (3) - Install NEW [4x]

  6. Connecting Rod Cap (2) - Install [4x]
    7. CAUTION:

    Refer to TORQUE-TO-YIELD FASTENER CAUTION

    CAUTION:

    This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

  7. Install the NEW connecting rod bolts (1) and tighten using the EN-45059-A  Angle Meter - Fastener Specifications
  8. Install the remaining connecting rod and piston assemblies.
  9. GM2146375Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Rotate the crankshaft to ensure that it moves freely and does not bind.

    Measure the connecting rod side clearance with a feeler gauge (1). ENGINE MECHANICAL SPECIFICATIONS

  10. Measure the piston deck height. ENGINE MECHANICAL SPECIFICATIONS
  11. GM5932173Courtesy of GENERAL MOTORS COMPANY

    Ensure proper use of room temperature vulcanizing (RTV) sealant. Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant

  12. Clean the engine block sealing surface and ensure the bolt threads are free of RTV and debris prior to RTV bead application.
  13. Clean the lower crankcase extension housing and ensure the housing is free of oils and finger prints prior to RTV bead application.
    14. NOTE:

    DO NOT allow the RTV to skim over, the crankcase extension housing must be installed within 8 minutes of RTV being applied.

  14. Apply a 4 mm bead of sealant (1) to the crankshaft rear oil seal housing. Adhesives, Fluids, Lubricants, and Sealers
  15. Apply 6 mm bead of sealant to the locations indicated, dimension a. Adhesives, Fluids, Lubricants, and Sealers
  16. GM5932171Courtesy of GENERAL MOTORS COMPANY

    Oil Pan High Pressure Port Seal (2) - Install NEW

  17. Lower Crankcase Extension (1) - Install
  18. GM5932169Courtesy of GENERAL MOTORS COMPANY

    Lower Crankcase Extension Bolt (1) - Install and tighten in sequence - Fastener Specifications

  19. Lower Crankcase Extension Bolt (2) - Install and tighten in sequence - Fastener Specifications
  20. Lower Crankcase Extension Bolt (3) - Install and tighten in sequence - Fastener Specifications
  21. Lower Crankcase Extension Bolt (4) - Install and tighten in sequence [8x] - Fastener Specifications
  22. Lower Crankcase Extension Bolt (5) - Install and tighten in sequence [3x] - Fastener Specifications
  23. GM5902206Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Balancer shaft driven sprocket is keyed to fit one way on the balancer driven shaft.

    Install the balancer chain and balancer shaft driven sprocket to the balancer driven shaft:

    1. Ensure the marks on the balancer driven shaft (2) face each other.
    2. Align the double yellow links (4) on the balancer shaft chain to the double timing marks on the balancer shaft driven sprocket (3).
    3. Align the pink link (1) to the timing mark on the crankshaft sprocket (5).
  24. GM5153224Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to TORQUE-TO-YIELD FASTENER CAUTION

    Balancer Shaft Sprocket Bolt (1) - Install NEW and tighten - Fastener Specifications

  25. GM5153495Courtesy of GENERAL MOTORS COMPANY

    Balancer Chain Guide (3) - Install

  26. Timing Chain Guide Bolt (2) - Install and tighten [2x] - Fastener Specifications
  27. GM5573763Courtesy of GENERAL MOTORS COMPANY

    If the balancer chain tensioner (1) needs to be assembled, install the check ball spring (2), plunger orifice (3), main spring (4) and the plunger (5). Then install the EN-955-10-A  Locking Pin to reset the tensioner.

  28. GM5153597Courtesy of GENERAL MOTORS COMPANY

    Balancer Chain Tensioner (2) - Install

  29. Balancer Chain Tensioner Bolt (1) - Install and tighten [2x] - Fastener Specifications
  30. GM5153596Courtesy of GENERAL MOTORS COMPANY

    EN-52593  Chain Tensioner Retention Pin (2) - Remove

  31. GM5614499Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    EN-52483  Cover Installation Guide Pins are used to ensure the cover is aligned properly and aids in keeping the crankshaft rear oil seal housing square to the engine block. Use the EN-52483  Cover Installation Guide Pins next to the crankshaft rear oil seal housing location pins.

    Install the EN-52483  Cover Installation Guide Pins (2).

  32. GM5045205Courtesy of GENERAL MOTORS COMPANY

    Ensure proper use of room temperature vulcanizing (RTV) sealant. Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant

  33. Clean the engine block sealing surface and ensure the bolt threads are free of RTV and debris prior to RTV bead application.
  34. Clean the NEW crankshaft rear oil seal housing and ensure the housing is free of oils and finger prints prior to RTV bead application.
    35. NOTE:

    DO NOT allow the RTV to skim over, the crankshaft rear seal housing must be installed within 8 minutes of RTV being applied.

  35. Apply a 4 mm bead of sealant (1) to the crankshaft rear oil seal housing. Adhesives, Fluids, Lubricants, and Sealers
  36. Apply 6 mm bead of sealant to the locations indicated, dimension a. Adhesives, Fluids, Lubricants, and Sealers
  37. GM5021095Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Use the seal protector/installer that comes with the new crankshaft rear oil seal housing.

    Install the supplied seal protector/installer (3) at the crankshaft rear oil seal. Adjust the seal protector/installer to the edge of the lip seal (4).

  38. Crankshaft Rear Oil Seal Housing (2) - Install NEW
    1. Align the new housing (2) to the EN-52483  Cover Installation Guide Pins (1).
    2. Stop when the seal protector contacts the end of the crankshaft.
    3. Now press in the center of the cover, allowing the crankshaft end to push out the protector.
    4. Once completed, inspect the outer perimeter of the seal and ensure it is seated correctly, and has not folded out of position.
  39. GM5614500Courtesy of GENERAL MOTORS COMPANY

    Crankshaft Rear Oil Seal Housing Bolt (1) - Install, but do NOT tighten [14x]

  40. Crankshaft Rear Oil Seal Housing Bolt (1) - Tighten in sequence [14x] - Loosening Sequence Loosening Sequence Fastener Specifications
  41. GM5642505Courtesy of GENERAL MOTORS COMPANY

    Crankshaft Position Sensor (2) - Install

  42. Crankshaft Position Sensor Bolt (1) - Install and tighten - Fastener Specifications
  43. GM5140979Courtesy of GENERAL MOTORS COMPANY

    Crankshaft Position Sensor Reluctor Ring (1) - Install

  44. GM5150614Courtesy of GENERAL MOTORS COMPANY

    Engage the EN-52476  Flywheel Lock and Alignment Tool (1) slide through the flex plate teeth.

  45. GM5138790Courtesy of GENERAL MOTORS COMPANY

    Automatic Transmission Flex Plate (2) - Install

  46. Automatic Transmission Flex Plate Bolt (1) - Install NEW and hand tighten [8x]
  47. Automatic Transmission Flex Plate Bolt (1) - Tighten in sequence - Fastener Specifications
  48. GM5150614Courtesy of GENERAL MOTORS COMPANY

    Ensure that the timing pin is in time with the flex plate hole and then disengage the pin by pulling back and rotating 90 degrees.

  49. GM5517355Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) - Connect

  50. GM5517356Courtesy of GENERAL MOTORS COMPANY

    Oil Pump Suction Pipe Gasket (3) - Install NEW

  51. Oil Pump Suction Pipe (2) - Install
  52. Oil Pump Suction Pipe Bolt (1) - Install and tighten - Fastener Specifications
  53. GM5389826Courtesy of GENERAL MOTORS COMPANY

    Wipe the oil pan surface with the Adhesion Plastic Pan Primer Promoter using a clean shop towel. Allow the cleaner to flash / evaporate. Wipe off the sealing surfaces with a lint free cloth. Do not touch the sealing surface after cleaning to avoid inducing containment debris to the bonding surface area. Adhesives, Fluids, Lubricants, and Sealers

  54. Ensure proper use of room temperature vulcanizing (RTV) sealant. Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant
    55. NOTE:

    Do not allow sealant to skim over, the oil pan must be installed within 8 minutes of sealer application.

  55. Apply a 3 mm bead of sealant (1) around the seal bead path, as shown. Adhesives, Fluids, Lubricants, and Sealers
  56. GM5389827Courtesy of GENERAL MOTORS COMPANY

    Install the EN-52483  Cover Installation Guide Pins (3) in two locations to ensure proper oil pan alignment.

  57. Oil Pan (2) - Install NEW
    58. NOTE:

    Install some lower oil pan bolts to secure the oil pan.

  58. Lower Oil Pan Bolt (1) - Install and hand tighten [4x]
  59. EN-52483  Cover Installation Guide Pins - Remove [2x]
    60. NOTE:

    Install the remaining lower oil pan bolts.

  60. Lower Oil Pan Bolt (1) - Install and hand tighten [13x]
  61. Lower Oil Pan Bolt (1) - Tighten in sequence [17x] - Fastener Specifications
  62. GM5022863Courtesy of GENERAL MOTORS COMPANY

    Cylinder Head Gasket (1) - Install NEW

  63. Cylinder Head (2) - Install
  64. Cylinder Head Bolt (3) - Install NEW and hand tighten [10x]
  65. Cylinder Head Bolt (4) - Install NEW and hand tighten [3x]
  66. Cylinder Head Bolt (5) - Install NEW and hand tighten [3x]
  67. Cylinder Head Bolt (6) - Install NEW and hand tighten [2x]
  68. Tighten the 18 cylinder head bolts (3, 4, 5, 6) in sequence. Fastener Specifications
  69. GM5043852Courtesy of GENERAL MOTORS COMPANY

    Use low VOC brake cleaner to ensure the surface areas are clean. Adhesives, Fluids, Lubricants, and Sealers

  70. EN-46109  Engine Front Cover Installation Guide Pins (2) - Install
  71. Apply a 3 mm wide RTV bead along the edge of the cylinder head. Path is perpendicular to the crank axis. Bead is centered 2.5 mm back from front edge of head. Bead runs the entire length of sealing surface across sealing land on both sides.Adhesives, Fluids, Lubricants, and Sealers
  72. Camshaft Cover Gasket (1) - Install NEW
  73. GM5022866Courtesy of GENERAL MOTORS COMPANY

    Camshaft Cover (1) - Install

    NOTE:

    Ensure the EN-52462-A  Camshaft Alignment Tool is installed and camshafts are in the timed position.

  74. Rock the camshaft carrier back and fourth to seat the camshaft carrier cover onto the two dowels in the cylinder head sealing surface.
  75. EN-46109  Engine Front Cover Installation Guide Pins (2) - Remove
  76. GM5043854Courtesy of GENERAL MOTORS COMPANY

    Camshaft Cover Bolt (1) - Install and hand tighten [5x]

  77. If a NEW threaded component is being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded component is reused, prepare the threaded component using the following steps:
    1. Remove any loose cured adhesive from the external threads of the component using a lint free cloth.
    2. Thread the cleaned component into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Apply thread locking adhesive to the external threads of the component. Adhesives, Fluids, Lubricants, and Sealers
    4. Ensure there are no gaps in the thread locking adhesive once applied to the component.
  78. Camshaft Cover Stud (2, 3) - Install and hand tighten [18x]
  79. Camshaft Cover Bolt (1) - Tighten in sequence [4x] - Fastener Specifications
  80. Camshaft Cover Stud (2, 3) - Tighten in sequence [18x] - Fastener Specifications
  81. GM5004079Courtesy of GENERAL MOTORS COMPANY

    Timing Chain (4) - Install

  82. Crankshaft Sprocket (3) - Install
  83. Timing Chain Guide (2) - Install
  84. Timing Chain Guide Bolt (1) - Install and tighten [2x] - Fastener Specifications
  85. GM5004068Courtesy of GENERAL MOTORS COMPANY

    Timing Chain Guide (5) - Install

  86. If a NEW threaded component is being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded component is reused, prepare the threaded component using the following steps:
    1. Remove any loose cured adhesive from the external threads of the component using a lint free cloth.
    2. Thread the cleaned component into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Apply thread locking adhesive to the external threads of the component. Adhesives, Fluids, Lubricants, and Sealers
    4. Ensure there are no gaps in the thread locking adhesive once applied to the component.
  87. Timing Chain Guide Bolt (4) - Install and tighten - Fastener Specifications
  88. Timing Chain Tensioner Gasket (3) - Install NEW
  89. Timing Chain Tensioner (2) - Install
  90. Timing Chain Tensioner Bolt (1) - Install and tighten [2x] - Fastener Specifications
  91. GM5257435Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Lubricate under the washer surface.

    Lubricate the NEW camshaft position actuator valve solenoid bolts (1) with clean engine oil where indicated. Adhesives, Fluids, Lubricants, and Sealers

  92. GM5299894Courtesy of GENERAL MOTORS COMPANY

    Install the exhaust camshaft position actuator (3) and the intake camshaft position actuator (4) before installing the tool.

  93. GM5257330Courtesy of GENERAL MOTORS COMPANY

    Install and hand tighten the NEW camshaft position actuator valve solenoid bolt (1) [2x].

  94. GM5256386Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Ensure the camshaft carrier and cylinder head face are clean and free from RTV prior to installing the EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter.

    EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter (2) - Install [2x]

  95. Install and tighten the two EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter bolts (3) enough to secure the EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter (2) to the cylinder head.
  96. GM5257213Courtesy of GENERAL MOTORS COMPANY

    EN-52461  Camshaft Torque Reaction Tool (1) @ EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter (2) - Install

  97. Install and tighten the two EN-52461  Camshaft Torque Reaction Tool bolts (3).
  98. GM5257414Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Hold the camshaft position actuator firmly and squarely during camshaft position actuator valve solenoid bolt removal/installation. Failure to do so may result in damage to the inside of the camshaft position actuator.

    NOTE:

    Pressure must be applied towards the engine on the EN-52461  Camshaft Torque Reaction Tool at points (3) prior to and during any time the following two conditions are simultaneously met.

    • The camshaft position actuator valve solenoid bolt is loosened or removed.
    • The EN-52461  Camshaft Torque Reaction Tool bolts (2, 3) are loosened.

    Shift the slack in the timing chain to be taken up by the timing chain tensioner.

    1. Use a wrench to turn the EN-52461  Camshaft Torque Reaction Tool (1) counter-clockwise 6 N.m 53 lb in, then hold.
    2. Tighten the EN-52461  Camshaft Torque Reaction Tool bolt (2) to lock the intake actuator securely in place.
    3. Remove the wrench from EN-52461  Camshaft Torque Reaction Tool (1).
    4. Use a wrench to turn the EN-52461  Camshaft Torque Reaction Tool (4) counter-clockwise 6 N.m 53 lb in, then hold.
    5. Tighten the EN-52461  Camshaft Torque Reaction Tool bolt (3) to lock the exhaust actuator securely in place.
    6. Remove the wrench from EN-52461  Camshaft Torque Reaction Tool (4).
  99. GM5257299Courtesy of GENERAL MOTORS COMPANY

    Tighten the NEW camshaft position actuator valve solenoid bolt (1). Fastener Specifications

  100. EN-46112  Tensioner Retraction Pins (6) - Remove
  101. GM5257293Courtesy of GENERAL MOTORS COMPANY

    Loosen the EN-52461  Camshaft Torque Reaction Tool bolts (2) to un-lock the actuators.

  102. Disengage the tangs of the EN-52461  Camshaft Torque Reaction Tool (1) from the intake and exhaust camshaft position actuator slots.
  103. GM5257213Courtesy of GENERAL MOTORS COMPANY

    Remove the two EN-52461  Camshaft Torque Reaction Tool bolts (3).

  104. EN-52461  Camshaft Torque Reaction Tool (1) @ EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter (2) - Remove
  105. GM5256386Courtesy of GENERAL MOTORS COMPANY

    Remove the two EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter bolts (3).

  106. EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter (2) - Remove [2x]
  107. Rotate both handles (4) of the EN-52462-A  Camshaft Alignment Tool towards the front of the engine.
  108. GM5256287Courtesy of GENERAL MOTORS COMPANY

    Loosen and disengage the EN-52462-A  Camshaft Alignment Tool bolt (2) from camshaft carrier.

  109. EN-52462-A  Camshaft Alignment Tool (1) - Remove
  110. GM5002064Courtesy of GENERAL MOTORS COMPANY

    Clean and apply sealant to the camshaft cover core hole plug (1) [2x]. Adhesives, Fluids, Lubricants, and Sealers

  111. Camshaft Cover Core Hole Plug (1) - Install and tighten [2x] - Fastener Specifications
  112. Camshaft Carrier Bolt (2) - Install and tighten - Fastener Specifications
  113. GM5021096Courtesy of GENERAL MOTORS COMPANY

    EN-52483  Cover Installation Guide Pins (4) - Install

  114. GM5045208Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The sealing surface must be clean and free of contaminants prior to applying the RTV sealant. Do not touch the sealing surface once it has been cleaned.

    Clean the sealing surface of the NEW engine front cover with low VOC brake cleaner, then wipe dry with a clean lint free cloth.

  115. Ensure proper use of room temperature vulcanizing (RTV) sealant. Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant
    116. NOTE:

    Do not allow RTV to skin over. The engine front cover must be installed within 8 minutes of RTV application.

  116. Apply a bead of RTV (1) to the NEW engine front cover. Adhesives, Fluids, Lubricants, and Sealers
  117. GM5021096Courtesy of GENERAL MOTORS COMPANY

    Engine Front Cover Locating Pin (1) - Install [2x]

    118. NOTE:

    Leave the seal protector that is supplied with the new engine front cover in place prior to installation. The crankshaft sprocket will push the seal protector out of the engine front cover as it is installed. Inspect the perimeter of the seal once the NEW engine front cover is completely seated to ensure the lip of the seal is not folded over itself.

  118. Engine Front Cover (2) - Install NEW
  119. Engine Front Cover Bolt (3) - Install and hand tighten [8x]
  120. EN-52483  Cover Installation Guide Pins (4) - Remove
  121. Engine Front Cover Bolt (3) - Install and hand tighten [2x]
  122. Engine Front Cover Bolt (3) - Tighten in sequence [10x] - Fastener Specifications
  123. GM5164169Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The timing pin (3) is installed into the flexplate for engine timing procedures, it can be damaged if torque is applied to the flexplate with the timing pin engaged. The pin must be placed in the retracted position before torque is applied to the flexplate.

    Install the slide (4) of the EN-52476  Flywheel Lock and Alignment Tool.

  124. GM5003927Courtesy of GENERAL MOTORS COMPANY

    Crankshaft Balancer (2) - Install

  125. Crankshaft Balancer Bolt (1) - Install NEW and tighten - Fastener Specifications
  126. GM5004054Courtesy of GENERAL MOTORS COMPANY

    Engine Front Cover Locating Pin - Install [2x]

  127. Timing Belt Front Upper Cover Seal (4) - Install NEW
  128. Apply a dollop of RTV on the T-joint of the camshaft carrier and cylinder head. Adhesives, Fluids, Lubricants, and Sealers
  129. Timing Chain Upper Cover (3) - Install
  130. Timing Chain Upper Cover Bolt (1) - Install and tighten [9x] - Fastener Specifications
  131. Timing Chain Upper Cover Bolt (2) - Install and tighten - Fastener Specifications
  132. GM5646819Courtesy of GENERAL MOTORS COMPANY

    Camshaft Position Actuator Magnet Gasket (3) - Install NEW

  133. Camshaft Position Actuator Magnet (2) - Install
  134. Camshaft Position Actuator Solenoid Valve Bolt (1) - Install and tighten [2x] - Fastener Specifications
  135. GM5646821Courtesy of GENERAL MOTORS COMPANY

    Camshaft Position Actuator Magnet Gasket (3) - Install NEW

  136. Camshaft Position Actuator Magnet (2) - Install
  137. Camshaft Position Actuator Solenoid Valve Bolt (1) - Install and tighten [2x] - Fastener Specifications
  138. Engine - Install - Engine Replacement (AWD)
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